I was also very disappointed that XMarks is going under. I tried Foxsync, but I was not impressed. I use a laptop in addition to a desktop, so I'm giving up syncing programs for my bookmarks. Instead, I'm just backing up my desktop bookmarks and importing them into the laptop as an html file. BTW, FEBE is a great add-in that backs up Firefox and its settings, including bookmarks, and I use that, too, to back up Firefox.